This review is by Tim Kyle of Tim Kyle Photography. Tim has used these Yongnuo’s as well as the Canon to shoot weddings. Tim did have one problem with one of the flashes which he returned. At the time Yongnuo had done a recall on theYONGNUO YN600EX-RT Master TTL Flash Speedlites for Canon. Since then they have released the flash once again.
The links below will take you to Amazon.
Once again this is 4 YONGNUO YN600EX-RT Master TTL Flash Speedlites for Canon
With a YONGNUO YN-E3-RT E3-RT E3RT TTL Flash Speedlite Wireless Transmitter for Canon
I use them almost every day. Yongnuo speedlites and triggers. Never had any issues with them.